load dynamic tilemaps.

gistfile1.js

var demo = {
    getTiledMapDefinition: function(tilemap, layerName, tileWidth, tileHeight, tileImageName, imgWidth, imgHeight) {
        var tileData = this.tileMapToArray(tilemap),
            tilemapHeight = tilemap.length,
            tilemapWidth = tilemap[0].length,
            tileLayer = this.tiledLayerBlueprint(tileData, tilemapHeight, tilemapWidth, layerName),
            tileImage = this.tiledTilesBlueprint(imgWidth, imgHeight, tileImageName, tileWidth, tileHeight);

        return this.tiledBlueprint(tileLayer, tileImage);

    },

    tiledBlueprint: function(layers, tilesets) {
        return {
            "height": 0,
            "width": 0,
            "layers": (typeof layers === 'array') ? layers : [layers],
            "orientation": "orthogonal",
            "tileheight": 0,
            "tilewidth": 0,
            "tilesets": (typeof tilesets === 'array') ? tilesets : [tilesets],
            "properties": {},
            "version": 1
        };
    },

    tiledLayerBlueprint: function(data, height, width, name) {
        return {
            "data": data,
            "height": height,
            "name": name,
            "opacity": 1,
            "type": "tilelayer",
            "visible": true,
            "width": width,
            "x": 0,
            "y": 0
        };
    },

    tiledTilesBlueprint: function(imgWidth, imgHeight, name, tilewidth, tileheight) {
        return {
            "firstgid": 0,
            "image": "",
            "imageheight": imgHeight,
            "imagewidth": imgWidth,
            "margin": 1,
            "name": name,
            "spacing": 0,
            "tileheight": tileheight || 32,
            "tilewidth": tilewidth || 32,
            "properties": {}
        };
    }
}

var tilemap = getSomeTilemap(w, h);
var tiles = demo.getTiledMapDefinition(tilemap, ...)

this.game.load.tilemap('map', null, tiles, Phaser.Tilemap.TILED_JSON);